diff --git a/README.md b/README.md
index 2169877..33cad20 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ Agaric is currently using a Platform as a Service version of Drutopia with addit
 
 Set up [drutopia_host](https://gitlab.com/drutopia-platform/drutopia_host) and [hosting_private](https://gitlab.com/drutopia-platform/hosting_private), as documented in hosting private.
 
-Then use [ahoy]().
+Then use [ahoy](https://github.com/ahoy-cli/ahoy/), from within the hosting_private directory.
 
 If Agaric's Drutopia PaaS base has changed (the composer.lock in this directory), produce and push a new build: